Quantity   Component name
2 × nrf24l01 nordic semi 2.4ghz radio module
1 × atmega328p Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × teensy 2.0
1 × cr2032 battery a 3.3v lithium battery
1 × battery holder.
1 × MCP1825 voltage regulator MCP1825S-3302E/DB